ABSTRACT
ABSTRACT: Ecological security assessment is the study of identification and judgment of the ecosystem integrity and the ability of maintaining health sustainable under risks. Taking the Liaohe River Basin as the study area, the index system for the water source area of the Liaohe River basin ecological security evaluation and evaluation model was established. Using the combined method of the GEM-AHP (Group Eigenvalue Method-Analytic Hierarchy Process) to calculate the weight of each evaluation indicator, the GMS (Gray system Modeling theory of Software) correlation degree analysis was used to determine the main influence factors. The results showed that the ecological security status of the water source area in Liaohe River Basin was IV (unsafe state) level, the per-capita GDP and population density, which had a great impact on the ecological security. Ecological environment problems in the water source area of the Liaohe River Basin included reduction of resources, low vegetation coverage and insufficient capital investment of pollution control.
